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xfs: scrub should check incore counters against ondisk headers 

In theory, the incore per-AG structure counters should match the ones on
disk, so check that.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
hifive-unleashed-5.2
Darrick J. Wong 2019-04-25 18:26:23 -07:00
parent 9a1f3049f4
commit 47cd97b5b2
1 changed files with 20 additions and 0 deletions
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20
fs/xfs/scrub/agheader.c
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@ -514,6 +514,7 @@ xchk_agf(
{
struct xfs_mount *mp = sc->mp;
struct xfs_agf *agf;
struct xfs_perag *pag;
xfs_agnumber_t agno;
xfs_agblock_t agbno;
xfs_agblock_t eoag;
@ -586,6 +587,16 @@ xchk_agf(
if (agfl_count != 0 && fl_count != agfl_count)
xchk_block_set_corrupt(sc, sc->sa.agf_bp);
/* Do the incore counters match? */
pag = xfs_perag_get(mp, agno);
if (pag->pagf_freeblks != be32_to_cpu(agf->agf_freeblks))
xchk_block_set_corrupt(sc, sc->sa.agf_bp);
if (pag->pagf_flcount != be32_to_cpu(agf->agf_flcount))
xchk_block_set_corrupt(sc, sc->sa.agf_bp);
if (pag->pagf_btreeblks != be32_to_cpu(agf->agf_btreeblks))
xchk_block_set_corrupt(sc, sc->sa.agf_bp);
xfs_perag_put(pag);
xchk_agf_xref(sc);
out:
return error;
@ -811,6 +822,7 @@ xchk_agi(
{
struct xfs_mount *mp = sc->mp;
struct xfs_agi *agi;
struct xfs_perag *pag;
xfs_agnumber_t agno;
xfs_agblock_t agbno;
xfs_agblock_t eoag;
@ -881,6 +893,14 @@ xchk_agi(
if (agi->agi_pad32 != cpu_to_be32(0))
xchk_block_set_corrupt(sc, sc->sa.agi_bp);
/* Do the incore counters match? */
pag = xfs_perag_get(mp, agno);
if (pag->pagi_count != be32_to_cpu(agi->agi_count))
xchk_block_set_corrupt(sc, sc->sa.agi_bp);
if (pag->pagi_freecount != be32_to_cpu(agi->agi_freecount))
xchk_block_set_corrupt(sc, sc->sa.agi_bp);
xfs_perag_put(pag);
xchk_agi_xref(sc);
out:
return error;